Look for dwarf varieties of citrus, such as 'Improved Meyer' lemon, 'Bearss' lime, 'Kaffir' lime, kumquats, 'Trovita' orange, 'Calamondin' orange, and 'Buddha's Hand' orange for container growing. These tend to stay between 6 and 12 feet tall at maturity outdoors and can be kept even at a smaller height in a container.